403212432 has 80 divisors (see below), whose sum is σ = 1208271872. Its totient is φ = 113477760.

The previous prime is 403212377. The next prime is 403212449. The reversal of 403212432 is 234212304.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 403212399 and 403212408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13557 + ... + 31467.

Almost surely, 2^403212432 is an apocalyptic number.

403212432 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403212432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604135936).

403212432 is an abundant number, since it is smaller than the sum of its proper divisors (805059440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403212432 is a wasteful number, since it uses less digits than its factorization.

403212432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17996 (or 17990 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 403212432 is about 20080.1501986414. The cubic root of 403212432 is about 738.7734929728.

Adding to 403212432 its reverse (234212304), we get a palindrome (637424736).

The spelling of 403212432 in words is "four hundred three million, two hundred twelve thousand, four hundred thirty-two".